Residents of Leiden, Netherlands, Dominik Blattner and Camille Grotenbreg, are being forced to dismantle a recently installed, high-efficiency heating system in their home. The system, intended to eliminate gas usage and reduce strain on the electricity grid, was installed as a sustainable renovation. However, local authorities have determined the boiler room housing the “heat battery” does not comply with the area’s protected cityscape regulations. Despite the significant investment in the energy-efficient upgrade, the couple must largely remove the installation. The case highlights a conflict between modern sustainability efforts and the preservation of historical urban landscapes. This decision raises questions about balancing environmental goals with heritage conservation policies within the city. The couple undertook the renovation willingly, seeking to contribute to a greener future, but are now facing setbacks due to aesthetic concerns.